This 12V car heater fan provides heating and fan modes to quickly clear frost, fog, and mist from the windshield, side windows, and rear window, giving you a clear view and a warmer cabin in cold weather. 2 in 1 operation: two adjustable modes for different needs. FAN delivers natural wind, HEAT delivers hot air, and OFF turns the unit off. It is suitable for defrosting and defogging as well as circulating room temperature air to improve cabin airflow. User friendly design: portable ergonomic handle for easy handling, and a 360degree rotation base with updown tilt to direct airflow exactly where you need it. This makes it a practical companion for the driving journey. Easy to install: simply connect the device to the vehicle cigarette lighter port and switch to heat or fan. Make sure your car has a 12V lighter port. No complex setup required. Practical use scenarios: In the morning, use HEAT to quickly defrost and defog the windshield and side windows for a safer, clearer view before driving. During winter drives, use FAN to circulate air and maintain comfortable cabin temperature without waiting for the engine heater. When passengers want quicker air circulation or to clear fog on rear or side windows, switch between modes to maintain visibility and comfort.